Jul 14 2020, 08:15 AM
QUOTE(gedebe @ Jul 14 2020, 07:44 AM)
I am still keeping my house analog phone for house alarm and recently it is faulty. TM has came and claim that it is my internal wiring which is having problem, I've checked it seems that although there is voltage around 12v but it stlll it won't establish connection, no ring tone.
What voltage are you talking about? As far as I know the phone line voltage is -48V. When your phone is off hook, then the voltage dropped to -9 ~ -12V.So, if you are talking about phone line voltage, then must be something faulty or switched on that pull the current. The phone line is current driven device. So, the voltage fluctuation is normal depending on what is using the current.
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